Attachment for sewing-machines.



G.' D. ARMSTRONG. ATTACHMENT FOE SEWING MACHINES. APPLICATION FILED NOV.16, 1908.

'93 1,369. Patented Aug. 17, 1909;

woewtov UNITED STATES PATENT QFFIGE,

CHARLES D. ARMSTRONG, OF PROVO, UTAH.

ATTACIHWENT FOR Specification of Letters Patent.

'SEWING-MAOHINES.

'' Patented Aug. 17, 1909.

7 Application filed November 16,-&908t-'-ScrialiNo; 462,817.

To all whom it may concern:

Be, it known that I, ()HAnLns D. Anars rnoxe, a citizen of the UnitedStates, residing at Provo,.in the county of Utah, State of Utah, haveinvented certain new and useful Improvements in Attachments forSewing-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to inakc'and use thesame.

This invention relates to attachments for sewing machines and hasspecial reference to an attachment to be placed on the fly wheel of asewing machine in the nature of a grinding or abrasive wheel.

One obgect 9f the invention is to provide an improved form of abrasivewheel for such use.

Another object of the invention is to provide an improved means ofsecuring said abrasive wheel to the iiy wheel of a sewing machine.

With the aboveand other objects in viewthe invention consists, ingeneral, of an lai'irasive wheel provided with improved attaching meansand of novel construction.

The invention further consists in certain novel details of construction,combinations of parts hereinafter described, illustrated in theaccompanyin drawings, and specifically set forth in the cIaims.

In the accompanying drawings, like char acters of reference indicatelike parts in the several views, and :Figure 1 is a side elevation of anabrasive wheel constructed in accordance with this invention and showingthe same applied to a sewing machine. Fig. 2 is a sectional .view on thevertical median plane of Fig.1.

In carrying out my invention, 1 provide 'a connatural abrasive wheel 10with a lining ll of felt so that the abrasive wheel" may be readilyslipped over the fly wheelof a sewin}; machine. In order to accomplishthis purpose, I make the abrasive wheel of annular form as clearlyshown. livotally mounted at three equidistant points around the innerperiphery of the wheel 10 are pairs of arms 12, one arm of each pairbeing provided with a smooth aperture, while the other arm is providedwith a threaded apergages the threaded aperture in the opposed arm.

In applying this invention to a machine, the thumb screws are removedand the arms swung outward The device is then slipped over the liy wheelof the machine. The arms are then turned down so as to graspthe wheel onboth sides and are brought together by placing the screws in the properapertures and screwing up upon the same. Itis to be noted that by reasonof the abrasive portion of the wheel being made of connatural materialthe lite thereof is greatly prolonged over the ordinary type of wheelwhich has an abrasive face and wood or leather backing. It is further tobe noted that the peculiar attaching means renders it unnecessary tomake special provision on the inasmuch the arms are adapted to graspsaid wheel at such points that centering of the abrasive wheel isreadily accomplished.

I have thus provided an efiicient and simple device of the kinddescribed and for the purpose specified.

Having thus described the is claimed as new, is

1. An attachment for sewing machines comprising anannular connaturalabrasive wheel, a feltlining therefor, and a plurality of pairs of armspivotally mounted on opposite sides of said wheel and adapted to gripthe fly wheel of asewing machine.

'2. An attachment for sewing machines comprising an annular connaturalabrasive wheel, a felt lining therefor, a plurality of pairs of armssecured on opposite sides of said wheel and adapted to grip the flywheel of a sewin machine, and means to force said arms toget er.

3. An attachment for sewing machines comprisin an annular connaturalabrasive wheel, a elt lining therefor, a plurality-of pairs of armspivotally mounted on opposite sides of said wheel and adapted to gripthe fly wheel of a machine, and means to force said arms together.

4. An attachment for sewing machines comprising an annular connaturalabrasive wheel, a telt lining therefor, a plurality of pairs of armssecured on opposite sides of said wheel and adapted to grip the wheelinvention, what of a machine, one arm of each pair being I provided witha threaded aperture and the tiy wheel of the machine for the attachmentother arm of the pair having a smooth aperture, and a screw held intheapertures of each pair.

5. .\n attachment for sewlng machines comprising an annular connaturalabrasive 10 pair being provided with a threaded aperl l l ture and'theother arm of the pair having a smooth aperture, and a screw held in theapertures of each pair. f

In testimony whereof, I affix my signature, in presence of twoWitnesses.

CHARLES D. ARMSTRONG.

Witnesses:

' R. LEO BIRD,

JOHN H. MCEWAN.

